Monoazo dye for wool.



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fi lililfimlil, i332 LEIPZIG, GERMANY, ASSIGNOR. T AGTIEN ANILIN FABRIKATIQN, (ll? BERLIN, GER-MANY.

GESELLSCHAFT To all whom may comers:

Be known that .l, Hnmnrcn POLIKIER, a subject of the'Czar of Russia, residing at Leipzig, Germany, my post-otlice address be- Lortzingstrasse. 14, Leipzig, Germany,

hare invented certain new anduseful improvements in Monoazo Dye for ool, of a the following is a specification;

. v invention relates to the manufacture of new yellow monoazo dyes for W001 fast washing, which may be obtained by combining; diazo compounds of the benzene se- .ries, substituted by chlorin in the ortho position tc the nitrogen with alkylaralkylanh lin-monosulionic acids.

'Tihe following example, the parts being by weight, fllustrates the invention, without, however, limiting it.

Example: 161 parts of 2.5-dichloroanilin are diazotiz-ed by means of parts of hydrccljeric acid of 12 Baurn and 7 parts or sodium nitrite and the diazo compound sulfonic acid in solution alkalinewith sodium carbonate, The separated dye 1s filtered oil and dried it produces on wool from an acid hath yellow tints of good fastness :o washing in the dry and pulyerized shape it is orange powder, easily soluble ism after to a yellow solution, which is not alter hyan alkali, but which is changed to a Having" now described the invention and what manner it may he performed what is,--- it AS anilin sulfonic acids,

is combined with 29.1 partsof ethylbenzyl new articles-of manufacture the Specification of Letters Patent. Patented Sept, 12, 191i, Application filed Jfuue 28, 1911. Serial No. 635,331.

herein-described new monoazo dyes derived from diazo compounds of the benzene series, substituted by chlorin in the ortho position to the nitrogen and alkylaralkylanilin sulfonic'acids, which dye Wool from an acid bath, generally speaking, yellowshades, which dyes are in the dry and pulverized shape of their sodium salts orange powders, easily soluble in water to a yellow solution, which is not altered by an alkali but which is changed to red from a dyes are soluble in concentrated sulfuric acid with a yellow coloration, turning to red on the addition of ice, whereupon the free acids of the dyes are separated and which dyes by mineral acid, which the benzene series and i-aminoalkylaralkyh 2. As a new article of manufacture the herein-described new monoazo dye derived from the diazotized 2.5-dichloroanilin and ethylbenzylanilin sulfonic acid, which dyes wool from an acid bath yellow shades, which dye is in the dry and pulverized sodium'salt an orange powder, easily soluble in water to a yellow solution, which is not altered by an alkali, but which is changed to red from a mineral acid, which dye is soluble in concentrated sulfuric acid with a yellow coloration, turning. to red on the addition of ice, whereupon the free acid of the dye is separated, and which dyeby reduction yields 2.5-dichlor0anilin and l-aniinoethylbenzylanilin sulfonicacid.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses EINRICH romaine.

Witnesses:

ALBERT R. Monawrrz, RUDOLPH QFRIQKE.

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